Net Assets Investment Company, Portfolio Turnover C000094080 [Member] Schwab U.S. REIT ETF C000126714 [Member] Schwab Fundamental U.S. Broad Market ETF C000126715 [Member] Schwab Fundamental U.S. Large Company ETF C000126716 [Member] Schwab Fundamental U.S. Small Company ETF C000126717 [Member] Schwab Fundamental International Equity ETF C000126718 [Member] Schwab Fundamental International Small Equity ETF C000126719 [Member] Schwab Fundamental Emerging Markets Equity ETF REIT Spliced Index [Member] Dow Jones Equity All REIT Capped Index [Member] StandardPoors500IndexMember Standard & Poor's 500 Index [Member] Fundamental US All Spliced Index [Member] RAFI Fundamental High Liquidity US All Index [Member] Russell 3000 Index [Member] Fundamental US Large Spliced Index [Member] RAFI Fundamental High Liquidity US Large Index [Member] Russell 1000 Index [Member] Fundamental US Small Spliced Index [Member] Russell 2000 Index [Member] RAFI Fundamental High Liquidity US Small Index [Member] RAFI Fundamental High Liquidity Developed ex US Large Index (Net) [Member] Fundamental Developed ex US Large Spliced Index [Member] MSCI EAFE® Index (Net) [Member] Fundamental Developed ex US Small Spliced Index [Member] S&P Developed ex-U.S. Small Cap Index (Net) [Member] RAFI Fundamental High Liquidity Developed ex US Small Index (Net) (Net) RAFI Fundamental High Liquidity Emerging Markets Index Net [Member] Fundamental Emerging Markets Spliced Index [Member] MSCI Emerging Markets Index Net [Member] Investment Type [Axis] CHINA TAIWAN BRAZIL SOUTH AFRICA THAILAND HONG KONG Other Countries [Member] INDIANA NEW MEXICO Financials [Member] Energy Sector [Member] Real Estate Sector [Member] Healthcare Sector [Member] Short-Term Investments [Member] Taiwan Semiconductor Manufacturing Co. Ltd. [Member] Alibaba Group Holding Ltd. [Member] Hon Hai Precision Industry Co. Ltd. [Member] China Construction Bank Corp., H Shares [Member] Vale SA [Member] Petroleo Brasileiro SA - Petrobras - Preferred Stock [Member] Petroleo Brasileiro SA - Petrobras - Common Stock [Member] Tencent Holdings Ltd. [Member] Industrial & Commercial Bank of China Ltd., H Shares [Member] JD.com, Inc. [Member] JAPAN CANADA KOREA, REPUBLIC OF UNITED KINGDOM AUSTRALIA FRANCE GERMANY SWITZERLAND SWEDEN Ibiden Co. Ltd. [Member] Daewoo Engineering & Construction Co. Ltd. [Member] Samsung Life Insurance Co. Ltd. [Member] Samsung E&A Co. Ltd. [Member] GS Engineering & Construction Corp. [Member] easyJet PLC [Member] Tower Semiconductor Ltd. [Member] Baytex Energy Corp. [Member] Helvetia Baloise Holding AG [Member] DL E&C Co. Ltd. [Member] SPAIN NETHERLANDS Samsung Electronics Co. Ltd. [Member] Shell PLC [Member] BHP Group Ltd. [Member] Glencore PLC [Member] HSBC Holdings PLC [Member] BP PLC [Member] Toyota Motor Corp. [Member] Roche Holding AG [Member] Banco Santander SA [Member] Crescent Energy Co., Class A [Member] MKS, Inc. [Member] Royalty Pharma PLC, Class A [Member] Lumentum Holdings, Inc. [Member] Victoria's Secret & Co. [Member] Compass, Inc., Class A [Member] Delek U.S. Holdings, Inc. [Member] Abercrombie & Fitch Co., Class A [Member] Par Pacific Holdings, Inc. [Member] Twilio, Inc., Class A [Member] Intel Corp. [Member] Apple, Inc. [Member] Microsoft Corp. [Member] ExxonMobil Holdings Corp. [Member] Amazon.com, Inc. [Member] Alphabet, Inc., Class A [Member] JPMorgan Chase & Co. [Member] Chevron Corp. [Member] Berkshire Hathaway, Inc., Class B [Member] UnitedHealth Group, Inc. [Member] Investment Companies [Member] Health Care REITs [Member] Retail REITs [Member] Industrial REITs [Member] Data Center REITs [Member] Telecom Tower REITs [Member] Multi-Family Residential REITs [Member] Other Specialized REITs [Member] Self Storage REITs [Member] Single-Family Residential REITs [Member] Office REITs [Member] Hotel & Resort REITs [Member] Diversified REITs [Member] Timber REITs [Member] Welltower, Inc. [Member] Prologis, Inc. [Member] Simon Property Group, Inc. [Member] Digital Realty Trust, Inc. [Member] Equinix, Inc. [Member] American Tower Corp. [Member] Realty Income Corp. [Member] Public Storage [Member] Vivmark Residential [Member] Ventas, Inc. [Member]